That's a good insight about Dunning-Kruger meeting the criteria for a sticky idea. I think the fit may be even better than you say. Everyone knows somebody who overestimates themselves in an annoying way, and I think DK hooks up with these memories instantly. So while DK is not a story per se, it might as well be; it releases stories in the brain.
I'd add another reason for the surprising catchiness of the Dunning-Kruger Effect: it's easy to say. Seriously, say "Dunning-Kruger Effect" several times: it's easy to say and actually feels good, like you've said something really substantive. Sounds trivial, but I bet it isn't.
Edit: oh and here's another: it's self-flattering. Who, on hearing this principle, has ever thought, "Oh, that's just like me, always overrating myself"? No. We all identify with the competent hero, unappreciated even by himself.
Slightly OT, but from reading about the Dunning-Kruger effect:
"Across four studies, the authors found that participants scoring in the bottom quartile on tests of humor, grammar, and logic grossly overestimated their test performance and ability. "
I find myself wondering -- how do you (formally) test someone on their humor ability?
I'd add another reason for the surprising catchiness of the Dunning-Kruger Effect: it's easy to say. Seriously, say "Dunning-Kruger Effect" several times: it's easy to say and actually feels good, like you've said something really substantive. Sounds trivial, but I bet it isn't.
Edit: oh and here's another: it's self-flattering. Who, on hearing this principle, has ever thought, "Oh, that's just like me, always overrating myself"? No. We all identify with the competent hero, unappreciated even by himself.